Emma is planning an experiment to examine whether reading to children increases their vocabulary size. she plans to measure the vocabulary size of a group of 18-month-olds, read to them three times a week for three months, then measure their vocabulary size again. how could emma change the design of the study to remove a major threat to internal validity?
a) she could add a comparison group.
b) she could make it a double-blind placebo control study.
c) she could counterbalance her conditions.
d) she could add a manipulation check.

Will award brainliest if it is done correct and answered ! : )part 1–list and describe all the ways an election affects a community. one example appears for you. some citizens volunteer their time to with a candidate’s campaign. part 2–answer the following questions in your own words. what are the requirements to vote in concord city (and most of the united states)? what is an ideology? how does it relate to voting? how does it relate to political parties? explain the differences between liberal, moderate, and conservative. what would you add to this list of things to consider when choosing a candidate? explain your answer. background and education family issue positions personality and character political party membership social group memberships work experience which item from the list above do you think is most important to consider when voting for a candidate? explain why. what are the media? how do the media play an important role in elections? give an example from the concord city election. what is bias? explain an example of bias you witnessed in the concord city election. what is symbolism? explain an example of symbolism you witnessed in the concord city election. what is propaganda? explain an example of propaganda you witnessed in the concord city election. in your opinion, which candidate was most successful in the debate? which one impressed you the most? which one was a disappointment? explain your responses. part 3–fill in the following chart with the appropriate labels. one appears for you. part 4–rank each candidate 1–5 for their success in each of the categories that follow. instructions: a “1” indicates little to no success, and a “5” indicates a high level of success. category rita republican norman no-tax elaine environs david democrat background and education family issue positions personality and character political party membership social group memberships work experience debate political ads website (fill in your own category) total of rankings for each candidate

Identify metropolitan statistical area

What is political freedom? how is it different from economic freedom?